CN102545420B

CN102545420B - Cast-aluminum rotor structure for AC motor and manufacturing method thereof

Info

Publication number: CN102545420B
Application number: CN201010591361XA
Authority: CN
Inventors: 赵靓; 廖立
Original assignee: NANYANG ELECTROMECHANICAL MOTOR CO Ltd SHANGHAI
Current assignee: NANYANG ELECTROMECHANICAL MOTOR CO Ltd SHANGHAI
Priority date: 2010-12-16
Filing date: 2010-12-16
Publication date: 2013-11-20
Anticipated expiration: 2030-12-16
Also published as: CN102545420A

Abstract

The invention relates to a cast-aluminum rotor structure for an AC motor and a manufacturing method thereof. The cast-aluminum rotor structure comprises two rotor half bodies which are spliced together, wherein each rotor half body comprises a rotor iron core, a lateral end ring, a central end ring and fan blades; the lateral end ring and the central end ring are arranged at both ends of the rotor iron core respectively; the fan blades are arranged at the outer end of the lateral end ring; and the outer ends of the central end rings of the two rotor half bodies are coaxially connected. According to the special process application of the cast-aluminum rotor structure, the integral cast-aluminum rotor is replaced by the spliced cast-aluminum rotor, and the torque of the motor is greatly increased under the condition of the same frame sizes by increasing the length of the rotor iron core in the premise of ensuring the internal quality of cast-aluminum rotors; and meanwhile, compared with the motors with the same toque and larger frame sizes, the motor obviously reduces rotational inertia, so that the dynamic response capability of the motor is obviously improved.

Description

A kind of manufacture method of cast-aluminum rotor structure of alternating current machine

Technical field

The present invention relates to alternating current machine, relate in particular to a kind of cast-aluminum rotor structure and manufacture method thereof of alternating current machine.

Background technology

In traditional alternating current machine aluminum process, no matter be pressure cast aluminium or centrifugal aluminum casting, more satisfactory cast-aluminum rotor size is that draw ratio was near 1: 1.Yet when core length was long, the time lengthening due to the cast of aluminium liquid, can cause internal rotor easily to produce the defects such as pore, has influence on the electric and mechanical performance of cast-aluminum rotor, thereby the safe operation of motor is brought hidden danger.Therefore, improve in the urgent need to the structure to this cast-aluminum rotor and manufacturing process at present.

Summary of the invention

The problem that exists in order to solve above-mentioned prior art, the present invention aims to provide a kind of cast-aluminum rotor structure and manufacture method thereof of alternating current machine, the cast-aluminum rotor internal soundness is guaranteed, and in the situation that electric current, large torque make motor be able to safe and reliable operation greatly.

The cast-aluminum rotor structure of the described a kind of alternating current machine of one of the present invention, it comprises two splicing all-in-one-piece rotor half-body, each rotor half-body comprises a rotor core, is separately positioned on a side Huan Heyi center end ring at these rotor core two ends and the fan blade that is arranged on described side ring outer end, and the outer end of the center end ring of described two rotor half-body is coaxial connected.

In the cast-aluminum rotor structure of above-mentioned alternating current machine, the outer end of the center end ring of described two rotor half-body adopts welding manner to connect.

Two described a kind of manufacture methods based on above-mentioned cast-aluminum rotor structure of the present invention, it comprises the following steps:

Casting step, described two rotor half-body of casting respectively, comprise the described fan blade of casting, side ring, rotor core and center end ring;

Procedure of processing, carry out respectively turning processing to the outer face of described Liang Ge center end ring, with the fineness of the outer face that guarantees them, and the outer rim of described Liang Ge center end ring carried out respectively chamfered;

Heating steps, send described two rotor half-body into baking oven and be heated to design temperature;

Installation steps, align hot jacket in a rotating shaft with described two rotor half-body, and make the outer face close contact of described Liang Ge center end ring;

The splicing step, the bevel for welding place that forms between the outer face of described Liang Ge center end ring welding, make described two rotor half-body integrally welded, forms described cast-aluminum rotor.

In the manufacture method of above-mentioned cast-aluminum rotor structure, in described installation steps, pass the rotor ventilation hole of described two rotor half-body by two round steel, make described two rotor half-body alignment, and make the skewed slot position consistency of described two rotor half-body.

In the manufacture method of above-mentioned cast-aluminum rotor structure, described splicing step realizes by a girth welding automatic aluminium welding machine, and this girth welding automatic aluminium welding machine comprises frame, welding gun and wire feeder; Described splicing step comprises, described two rotor half-body that first will be installed together and rotating shaft handling are to described shelf position, and adopt the two top modes that clamp, with their fixed placement on described frame, after described welding gun and wire feeder arrive described bevel for welding place automatically, described rotating shaft rotation, make described two rotor half-body integrally welded, forms described cast-aluminum rotor.

Owing to having adopted above-mentioned technical solution, the present invention is by special process application, make spliced cast-aluminum rotor substitute the integral type cast-aluminum rotor, under the prerequisite that guarantees the cast-aluminum rotor internal soundness, by increasing the length of rotor core, make in the situation that identical seat No., the torque of motor is highly improved; Simultaneously, with the large seat No. motor of same torque, compare, make again the moment of inertia of motor obviously reduce, thereby significantly strengthen the dynamic response capability of motor.

Description of drawings

Fig. 1 is the structural representation of the cast-aluminum rotor structure rotor halfbody of a kind of alternating current machine of the present invention;

Fig. 2 carries out the state diagram of installation steps in the manufacture method of cast-aluminum rotor structure of a kind of alternating current machine of the present invention;

Fig. 3 splices the state diagram of step in the manufacture method of cast-aluminum rotor structure of a kind of alternating current machine of the present invention.

Embodiment

Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.

See also Fig. 1 to Fig. 3, the present invention, it is a kind of cast-aluminum rotor structure of alternating current machine, it comprises two splicing all-in-one-piece rotor half-body 10, the fan blade 1 that each rotor half-body 10 comprises a rotor core 3, be separately positioned on the side ring 2 at these rotor core 3 two ends and a center end ring 4 and be arranged on side ring 2 outer ends, and the outer end of two rotor half-body 10De center end ring 4 is connected by welding manner is coaxial.

The manufacture method of above-mentioned cast-aluminum rotor structure, comprise the following steps:

Casting step, two rotor half-body 10 of casting respectively, comprise casting fan blade 1, side ring 2, rotor core 3 and center end ring 4;

Procedure of processing, the outer face of Dui Liangge center end ring 4 are carried out respectively turning processing, and with the fineness of the outer face that guarantees them, and the outer rim of Dui Liangge center end ring 4 is carried out respectively chamfered;

Heating steps, send two rotor half-body 10 into baking oven and be heated to design temperature;

Installation steps, align hot jackets in a rotating shaft 5 with two rotor half-body 10, and the outer face close contact of Shi Liangge center end ring 4; In this process, can pass the rotor ventilation hole (not shown) of two rotor half-body 10 by two round steel 6, make 10 alignment of two rotor half-body, and keep the consistency of the skewed slot (not shown) position of two rotor half-body 10;

Splicing step, the cross section that forms between the outer face of Zai Liangge center end ring 4 are leg-of-mutton bevel for welding 44 places welding, make two rotor half-body 10 integrally welded, form cast-aluminum rotor; This process can realize by a girth welding automatic aluminium welding machine, and this girth welding automatic aluminium welding machine comprises frame 7, welding gun 8 and wire feeder 9; The splicing step comprises specifically that first two rotor half-body 10 that by hoisting equipment, will be installed together and rotating shaft 5 handlings are to frame 7 positions, and adopt the two top modes that clamp, with their fixed placement on frame 7, after welding gun 8 and wire feeder 9 arrive bevel for welding 44 places (being pad) automatically, rotating shaft 5 rotations, thus make two rotor half-body 10 be welded into the cast-aluminum rotor of reliable one; In addition, after completing welding, should reach apparent full smooth, the size uniform of weld seam, fissureless welding quality requirement.

Basic principle of the present invention is: will long iron core cast-aluminum rotor be divided into two sections draw ratios near the rotor half-body of 1: 1, carry out respectively the casting of aluminium liquid, their inner cast aluminium quality are well guaranteed, then by hot jacket and other corresponding processes in rotating shaft, make them be spliced into a monoblock cast aluminium rotor, thereby reach the effect of long iron core cast-aluminum rotor, effectively guarantee simultaneously the security reliability of motor operation; Adopt the AC compact electric motor of cast-aluminum rotor structure of the present invention, have small size, export the characteristics such as torque, little moment of inertia, high dynamic response greatly.

Below embodiment has been described in detail the present invention by reference to the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details in embodiment should not form limitation of the invention, and the present invention will be used scope that appended claims defines as protection scope of the present invention.

Claims

1. the manufacture method of the cast-aluminum rotor of an alternating current machine, described cast-aluminum rotor structure comprises two splicing all-in-one-piece rotor half-body, each rotor half-body comprises a rotor core, is separately positioned on a side Huan Heyi center end ring at these rotor core two ends and the fan blade that is arranged on described side ring outer end, and the outer end of the center end ring of described two rotor half-body is coaxial to be connected

Described manufacture method comprises the following steps:

The splicing step, the bevel for welding place that forms between the outer face of described Liang Ge center end ring welding, make described two rotor half-body integrally welded, forms described cast-aluminum rotor,

In described installation steps, pass the rotor ventilation hole of described two rotor half-body by two round steel, make described two rotor half-body alignment, and make the skewed slot position consistency of described two rotor half-body,

Described splicing step realizes by a girth welding automatic aluminium welding machine, and this girth welding automatic aluminium welding machine comprises frame, welding gun and wire feeder; Described splicing step comprises, described two rotor half-body that first will be installed together and rotating shaft handling are to described shelf position, and adopt the two top modes that clamp, with their fixed placement on described frame, after described welding gun and wire feeder arrive described bevel for welding place automatically, described rotating shaft rotation, make described two rotor half-body integrally welded, forms described cast-aluminum rotor.